A kind of asynchronous hot continuous rolling method for preparing hot-rolled ultra-thin steel strip
A technology of hot continuous rolling and asynchronous rolling, applied in the direction of metal rolling, can solve the problem of no reports, and achieve the effect of improving the rolling capacity
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Embodiment 1
[0074] An asynchronous continuous hot rolling method for preparing a hot-rolled ultra-thin steel strip. The specific implementation steps are: prepare an intermediate billet with a thickness of 14.0mm and a width of 1700mm, adopt the rolling mode of M1, and perform hot rolling and finishing rolling with five stands The unit rolls a carbon structural steel strip with a thickness of 1.0mm. The chemical composition of the steel strip in Example 1 is by weight percentage (≤, %): C: 0.20, Si: 0.30, Mn: 0.65, P: 0.045, S: 0.04, and the balance is Fe. The finish rolling start temperature is 980°C, the finish rolling temperature is 880°C, and the coiling temperature is 680°C. Among them, the different speed ratios of S1 and S2 racks are 1.28 and 0.78 respectively. The exit thickness, M1 mode rolling force and conventional rolling force of each stand are shown in Table 7.
[0075] Exit thickness, M1 mode rolling force and conventional rolling rolling force of table 7 embodiment 1
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Embodiment 2
[0079] An asynchronous continuous hot rolling method for preparing a hot-rolled ultra-thin steel strip. The specific implementation steps are: prepare an intermediate billet with a thickness of 12.0 mm and a width of 1850 mm, adopt the M2 rolling mode, and pass through a five-stand hot continuous rolling finish rolling unit Hot-rolled steel strip for pipe making with a finished product thickness of 0.9 mm. The chemical composition of the steel strip in Example 2 is by weight percentage (≤, %): C: 0.10, Si: 0.35, Mn: 0.50, P: 0.04, S: 0.040, and the balance is Fe. The starting temperature of finish rolling is 970°C, the finishing temperature is 870°C, and the coiling temperature is 680°C. Among them, the different speed ratios of S2 and S3 racks are 1.01 and 0.99 respectively. The exit thickness, M2 mode rolling force and conventional rolling force of each stand are shown in Table 8.
[0080] Exit thickness of table 8 embodiment 2, M2 mode rolling force and conventional rolli...
Embodiment 3
[0084] An asynchronous continuous hot rolling method for preparing a hot-rolled ultra-thin steel strip. The specific implementation steps are: prepare an intermediate billet with a thickness of 12.0mm and a width of 1250mm, adopt the M3 rolling mode, and pass through a five-stand hot continuous rolling finish rolling unit Hot-rolled non-alloy structural steel strip with a thickness of 0.8mm. The chemical composition of the steel strip in Example 3 is by weight percentage (≤, %): C: 0.18, Mn: 0.15, P: 0.045, S: 0.040, N: 0.08, Cu: 0.42, and the balance is Fe. The finish rolling start temperature is 970°C, the finish rolling temperature is 860°C, and the coiling temperature is 680°C. Among them, the different speed ratios of S3 and S4 racks are 1.2 and 0.83 respectively. The exit thickness, M3 mode rolling force and conventional rolling force of each stand are shown in Table 9.
[0085] Exit thickness of table 9 embodiment 3, M3 mode rolling force and conventional rolling roll...
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